Shut-off device

Abstract

The invention relates to a shut-off device for low-temperature media, with a housing ( 2 ), a valve seat ( 5 ) located in the housing ( 2 ), and a butterfly valve ( 3 ) that triggers the valve seat and that is pivotally supported in the housing ( 2 ), on the housing ( 2 ) at least one flange ( 10 ) being formed for mounting the shut-off device in a pipeline. The object of making available a low-temperature shut-off device at low construction cost and maintenance cost is achieved according to the invention in that the flange ( 10 ) of the housing ( 2 ) is designed as a welding flange ( 10 a , 10 b ) for attachment of the shut-off device ( 1 ) in the pipeline by means of a weld joint, especially a butt weld joint, and the housing ( 2 ) is provided with a housing opening ( 11 ) for mounting and/or removing the butterfly valve ( 3 ).

1 . Shut-off device for low-temperature media with a housing, a valve seat located in the housing, and a butterfly valve that triggers the valve seat and that is pivotally supported in the housing, on the housing at least one flange being designed for mounting of the shut-off device in a pipeline, characterized in that the flange ( 10 ) of the housing ( 2 ) is designed as a welding flange ( 10   a ,  10   b ) for attachment of the shut-off device ( 1 ) in the pipeline by means of a weld joint, especially a butt weld joint, and the housing ( 2 ) is provided with a housing opening ( 11 ) for mounting and/or removing the butterfly valve ( 3 ). 
   
   
       2 . Shut-off device according to  claim 1 , wherein the valve seat ( 5 ) is made on a valve seat component ( 6 ) that is detachably mounted in the housing ( 2 ) by means of a flange ( 7 ), especially a screw flange, and the valve seat component ( 6 ) can be mounted and/or removed through the housing opening ( 11 ). 
   
   
       3 . Shut-off device according to  claim 1 , wherein the housing opening ( 11 ) is located perpendicular to the axis of rotation (D) of the butterfly valve ( 3 ). 
   
   
       4 . Shut-off device according to  claim 1 , wherein the housing diameter (DM) of the housing ( 2 ) in the region of the welding flange ( 10   a ,  10   b ) corresponds to the pipe diameter of the pipeline. 
   
   
       5 . Shut-off device according to  claim 1 , wherein the butterfly valve ( 3 ) is dynamically connected to a drive shaft ( 4 ) that is supported in a bearing component ( 12 ), the bearing component ( 12 ) being detachably mounted on the housing ( 2 ) in the region of the housing opening ( 11 ). 
   
   
       6 . Shut-off device according to  claim 5 , wherein the drive shaft ( 4 ) has one shaft section ( 4   a ) supported in the bearing component ( 12 ) and one shaft section ( 4   b ) supported in the housing ( 2 ), the butterfly valve ( 3 ) being detachably mounted on the shaft sections ( 4   a ,  4   b ). 
   
   
       7 . Shut-off device according to  claim 5 , wherein a drive means ( 19 ) that is dynamically connected to the drive shaft ( 4 ) is mounted on the bearing component ( 12 ). 
   
   
       8 . Shut-off device according to  claim 5 , wherein a mounting flange ( 13 ), especially a screw flange, is made on the housing opening ( 11 ) for attachment of the bearing component ( 12 ). 
   
   
       9 . Shut-off device according to  claim 8 , wherein there is a centering and/or sealing means ( 15 ) between the mounting flange ( 13 ) and the bearing component ( 12 ). 
   
   
       10 . Shut-off device according to  claim 9 , wherein the centering and/or sealing means ( 15 ) is designed as a projection that is located in a peripheral groove. 
   
   
       11 . Shut-off device according to  claim 8 , wherein a blind flange can be detachably mounted on the mounting flange ( 13 ) that is located on the housing opening ( 11 ). 
   
   
       12 . Shut-off device according to  claim 1 , wherein a mounting means ( 20 ) for detachable mounting of a testing means is made on the housing ( 2 ) in the region of the welding flange ( 10   a ,  10   b ). 
   
   
       13 . Shut-off device according to  claim 12 , wherein the mounting means ( 20 ) is designed as a peripheral groove ( 21 ) that is located on the housing ( 2 ). 
   
   
       14 . Shut-off device according to  claim 1 , wherein after mounting the housing ( 2 ) in the pipeline, a test housing is provided for inspecting the butterfly valve ( 3 ) and/or the valve seat ( 5 ). 
   
   
       15 . Shut-off device according to  claim 14 , wherein the bearing component ( 12 ) provided with the butterfly valve ( 2 ) and the valve seat component ( 6 ) are detachably mounted in the test housing.